123770798138 has 32 divisors (see below), whose sum is σ = 202932801792. Its totient is φ = 56270592000.

The previous prime is 123770798131. The next prime is 123770798231. The reversal of 123770798138 is 831897077321.

It is not an unprimeable number, because it can be changed into a prime (123770798131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2099363 + ... + 2157513.

It is an arithmetic number, because the mean of its divisors is an integer number (6341650056).

Almost surely, 2^123770798138 is an apocalyptic number.

123770798138 is a deficient number, since it is larger than the sum of its proper divisors (79162003654).

123770798138 is a wasteful number, since it uses less digits than its factorization.

123770798138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59390.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 123770798138 in words is "one hundred twenty-three billion, seven hundred seventy million, seven hundred ninety-eight thousand, one hundred thirty-eight".